package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.CustomException;
import com.itheima.entity.Category;
import com.itheima.entity.Dish;
import com.itheima.entity.Setmeal;
import com.itheima.mapper.CategoryMapper;
import com.itheima.service.CategoryService;
import com.itheima.service.DishService;
import com.itheima.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper,Category> implements CategoryService {

    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;

    @Override
    public void deleteByCondition(Long id){
        LambdaQueryWrapper<Dish> lqw1=new LambdaQueryWrapper<>();
        lqw1.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(lqw1);
        if(count1>0){
            throw new CustomException("当前分类下关联了菜品,不能删除");
        }
        LambdaQueryWrapper<Setmeal> lqw2=new LambdaQueryWrapper<>();
        lqw2.eq(Setmeal::getCategoryId,id);
        int count2=setmealService.count(lqw2);
        if(count2>0){
            throw new CustomException("当前分类下关联了套餐,不能删除");
        }
        this.removeById(id);
    }
    public String getById4Type(Long id){
        LambdaQueryWrapper<Category> lqw=new LambdaQueryWrapper<>();
        lqw.eq(id!=null,Category::getId,id);
        Category category = this.getOne(lqw);
        return category.getName();
    }
}
